Is there such a thing as sex reversal?
Duplications of the Xp21 region have been shown to cause XY female development and this led to the proposal that a dosage-sensitive sex-reversing (DSS) gene must exist. Two active copies of the postulated DSS gene are believed to override the testis-determining signal, resulting in the development of ovaries and XY female sex-reversal.
Are there any amphibians that do sex reversal?
Research in wild populations of the North American green frog has demonstrated that sex reversal is common. This work shows that genetic females sex reverse into phenotypic males and that genetic males sex reverse into phenotypic females, providing evidence that sex reversal can be bidirectional in amphibians.
What does sex reversal mean in GSD species?
In GSD species sex reversal means that the sexual phenotype is discordant with the genetic/chromosomal sex. In TSD species sex reversal means that the temperature/conditions that usually trigger the differentiation towards one sexual phenotype are producing the opposite sexual phenotype.
Is the phenotypic sex the same in sex reversal?
In sex reversal, the genetic or chromosomal sex does not agree with the phenotypic sex.
Research in wild populations of the North American green frog has demonstrated that sex reversal is common. This work shows that genetic females sex reverse into phenotypic males and that genetic males sex reverse into phenotypic females, providing evidence that sex reversal can be bidirectional in amphibians.
Duplications of the Xp21 region have been shown to cause XY female development and this led to the proposal that a dosage-sensitive sex-reversing (DSS) gene must exist. Two active copies of the postulated DSS gene are believed to override the testis-determining signal, resulting in the development of ovaries and XY female sex-reversal.
In sex reversal, the genetic or chromosomal sex does not agree with the phenotypic sex.
In GSD species sex reversal means that the sexual phenotype is discordant with the genetic/chromosomal sex. In TSD species sex reversal means that the temperature/conditions that usually trigger the differentiation towards one sexual phenotype are producing the opposite sexual phenotype.
